# how to remove specific feature from specific sample ? **URL:** https://forum.qiime2.org/t/how-to-remove-specific-feature-from-specific-sample/14912 **Category:** User Support **Created:** [May 12, 2020, 10:40pm UTC](https://forum.qiime2.org/t/how-to-remove-specific-feature-from-specific-sample/14912 "2020-05-12T22:40:20Z") **Posts on this page:** 1 **Showing post:** 4
### Author: ![thermokarst](https://forum.qiime2.org/letter_avatar_proxy/v4/letter/t/8e7dd6/32.png) [@thermokarst](https://forum.qiime2.org/u/thermokarst) #### Post date: [May 13, 2020, 6:01pm UTC](https://forum.qiime2.org/t/how-to-remove-specific-feature-from-specific-sample/14912/4 "2020-05-13T18:01:21Z")
That is an interesting workflow, @ChrisKeefe, thanks for sharing! @ilhem (and anyone else following along) - I just want to let you know that contaminant filtering has been discussed at length on the forum: [Search results for 'control filter' - QIIME 2 Forum](https://forum.qiime2.org/search?q=control%20filter), and there is a lot to review on the subject. I would recommend reviewing the first page or so of those posts - there are many opinions on this matter, but I think that there is sufficient reason to at least _proceed with caution_ when attempting to filter based on control samples. I think @Nicholas_Bokulich summarized it best here ([link](https://forum.qiime2.org/t/3-negative-controls-what-is-the-best-way-to-filter-my-samples-and-not-delete-important-data-from-them/7324/2)): > [@3 Negative Controls - What is the best way to filter my samples and not delete important data from them](https://forum.qiime2.org/t/3-negative-controls-what-is-the-best-way-to-filter-my-samples-and-not-delete-important-data-from-them/7324/2): > > If there is any consensus, though, it is that filtering out anything found in negative controls by default is a bad idea. See this discussion for more details: --- _[View the full topic](https://forum.qiime2.org/t/how-to-remove-specific-feature-from-specific-sample/14912)._